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Luthold C, Lambert H, Guilbert SM, Rodrigue MA, Fuchs M, Varlet AA, Fradet-Turcotte A, Lavoie JN. CDK1-Mediated Phosphorylation of BAG3 Promotes Mitotic Cell Shape Remodeling and the Molecular Assembly of Mitotic p62 Bodies. Cells 2021; 10:cells10102638. [PMID: 34685619 PMCID: PMC8534064 DOI: 10.3390/cells10102638] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Revised: 09/22/2021] [Accepted: 09/27/2021] [Indexed: 01/07/2023] Open
Abstract
The cochaperone BCL2-associated athanogene 3 (BAG3), in complex with the heat shock protein HSPB8, facilitates mitotic rounding, spindle orientation, and proper abscission of daughter cells. BAG3 and HSPB8 mitotic functions implicate the sequestosome p62/SQSTM1, suggesting a role for protein quality control. However, the interplay between this chaperone-assisted pathway and the mitotic machinery is not known. Here, we show that BAG3 phosphorylation at the conserved T285 is regulated by CDK1 and activates its function in mitotic cell shape remodeling. BAG3 phosphorylation exhibited a high dynamic at mitotic entry and both a non-phosphorylatable BAG3T285A and a phosphomimetic BAG3T285D protein were unable to correct the mitotic defects in BAG3-depleted HeLa cells. We also demonstrate that BAG3 phosphorylation, HSPB8, and CDK1 activity modulate the molecular assembly of p62/SQSTM1 into mitotic bodies containing K63 polyubiquitinated chains. These findings suggest the existence of a mitotically regulated spatial quality control mechanism for the fidelity of cell shape remodeling in highly dividing cells.
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Affiliation(s)
- Carole Luthold
- Centre de Recherche sur le Cancer, Université Laval, Quebec, QC G1R 3S3, Canada; (C.L.); (H.L.); (S.M.G.); (M.-A.R.); (M.F.); (A.-A.V.); (A.F.-T.)
- Oncology, Centre de Recherche du CHU de Québec-Université Laval, Hôtel-Dieu de Québec, Quebec, QC G1R 3S3, Canada
| | - Herman Lambert
- Centre de Recherche sur le Cancer, Université Laval, Quebec, QC G1R 3S3, Canada; (C.L.); (H.L.); (S.M.G.); (M.-A.R.); (M.F.); (A.-A.V.); (A.F.-T.)
- Oncology, Centre de Recherche du CHU de Québec-Université Laval, Hôtel-Dieu de Québec, Quebec, QC G1R 3S3, Canada
| | - Solenn M. Guilbert
- Centre de Recherche sur le Cancer, Université Laval, Quebec, QC G1R 3S3, Canada; (C.L.); (H.L.); (S.M.G.); (M.-A.R.); (M.F.); (A.-A.V.); (A.F.-T.)
- Oncology, Centre de Recherche du CHU de Québec-Université Laval, Hôtel-Dieu de Québec, Quebec, QC G1R 3S3, Canada
| | - Marc-Antoine Rodrigue
- Centre de Recherche sur le Cancer, Université Laval, Quebec, QC G1R 3S3, Canada; (C.L.); (H.L.); (S.M.G.); (M.-A.R.); (M.F.); (A.-A.V.); (A.F.-T.)
- Oncology, Centre de Recherche du CHU de Québec-Université Laval, Hôtel-Dieu de Québec, Quebec, QC G1R 3S3, Canada
| | - Margit Fuchs
- Centre de Recherche sur le Cancer, Université Laval, Quebec, QC G1R 3S3, Canada; (C.L.); (H.L.); (S.M.G.); (M.-A.R.); (M.F.); (A.-A.V.); (A.F.-T.)
- Oncology, Centre de Recherche du CHU de Québec-Université Laval, Hôtel-Dieu de Québec, Quebec, QC G1R 3S3, Canada
| | - Alice-Anaïs Varlet
- Centre de Recherche sur le Cancer, Université Laval, Quebec, QC G1R 3S3, Canada; (C.L.); (H.L.); (S.M.G.); (M.-A.R.); (M.F.); (A.-A.V.); (A.F.-T.)
- Oncology, Centre de Recherche du CHU de Québec-Université Laval, Hôtel-Dieu de Québec, Quebec, QC G1R 3S3, Canada
| | - Amélie Fradet-Turcotte
- Centre de Recherche sur le Cancer, Université Laval, Quebec, QC G1R 3S3, Canada; (C.L.); (H.L.); (S.M.G.); (M.-A.R.); (M.F.); (A.-A.V.); (A.F.-T.)
- Oncology, Centre de Recherche du CHU de Québec-Université Laval, Hôtel-Dieu de Québec, Quebec, QC G1R 3S3, Canada
- Département de Biologie Moléculaire, Biochimie Médicale et Pathologie, Faculté de Médecine, Université Laval, Quebec, QC G1V0A6, Canada
| | - Josée N. Lavoie
- Centre de Recherche sur le Cancer, Université Laval, Quebec, QC G1R 3S3, Canada; (C.L.); (H.L.); (S.M.G.); (M.-A.R.); (M.F.); (A.-A.V.); (A.F.-T.)
- Oncology, Centre de Recherche du CHU de Québec-Université Laval, Hôtel-Dieu de Québec, Quebec, QC G1R 3S3, Canada
- Département de Biologie Moléculaire, Biochimie Médicale et Pathologie, Faculté de Médecine, Université Laval, Quebec, QC G1V0A6, Canada
- Correspondence:
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Cuello F, Knaust AE, Saleem U, Loos M, Raabe J, Mosqueira D, Laufer S, Schweizer M, van der Kraak P, Flenner F, Ulmer BM, Braren I, Yin X, Theofilatos K, Ruiz‐Orera J, Patone G, Klampe B, Schulze T, Piasecki A, Pinto Y, Vink A, Hübner N, Harding S, Mayr M, Denning C, Eschenhagen T, Hansen A. Impairment of the ER/mitochondria compartment in human cardiomyocytes with PLN p.Arg14del mutation. EMBO Mol Med 2021; 13:e13074. [PMID: 33998164 PMCID: PMC8185541 DOI: 10.15252/emmm.202013074] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 03/31/2021] [Accepted: 04/07/2021] [Indexed: 12/28/2022] Open
Abstract
The phospholamban (PLN) p.Arg14del mutation causes dilated cardiomyopathy, with the molecular disease mechanisms incompletely understood. Patient dermal fibroblasts were reprogrammed to hiPSC, isogenic controls were established by CRISPR/Cas9, and cardiomyocytes were differentiated. Mutant cardiomyocytes revealed significantly prolonged Ca2+ transient decay time, Ca2+ -load dependent irregular beating pattern, and lower force. Proteomic analysis revealed less endoplasmic reticulum (ER) and ribosomal and mitochondrial proteins. Electron microscopy showed dilation of the ER and large lipid droplets in close association with mitochondria. Follow-up experiments confirmed impairment of the ER/mitochondria compartment. PLN p.Arg14del end-stage heart failure samples revealed perinuclear aggregates positive for ER marker proteins and oxidative stress in comparison with ischemic heart failure and non-failing donor heart samples. Transduction of PLN p.Arg14del EHTs with the Ca2+ -binding proteins GCaMP6f or parvalbumin improved the disease phenotype. This study identified impairment of the ER/mitochondria compartment without SR dysfunction as a novel disease mechanism underlying PLN p.Arg14del cardiomyopathy. The pathology was improved by Ca2+ -scavenging, suggesting impaired local Ca2+ cycling as an important disease culprit.
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Beal DM, Tournus M, Marchante R, Purton TJ, Smith DP, Tuite MF, Doumic M, Xue WF. The Division of Amyloid Fibrils: Systematic Comparison of Fibril Fragmentation Stability by Linking Theory with Experiments. iScience 2020; 23:101512. [PMID: 32920487 PMCID: PMC7492994 DOI: 10.1016/j.isci.2020.101512] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 07/31/2020] [Accepted: 08/26/2020] [Indexed: 01/22/2023] Open
Abstract
The division of amyloid protein fibrils is required for the propagation of the amyloid state and is an important contributor to their stability, pathogenicity, and normal function. Here, we combine kinetic nanoscale imaging experiments with analysis of a mathematical model to resolve and compare the division stability of amyloid fibrils. Our theoretical results show that the division of any type of filament results in self-similar length distributions distinct to each fibril type and the conditions applied. By applying these theoretical results to profile the dynamical stability toward breakage for four different amyloid types, we reveal particular differences in the division properties of disease-related amyloid formed from α-synuclein when compared with non-disease associated model amyloid, the former showing lowered intrinsic stability toward breakage and increased likelihood of shedding smaller particles. Our results enable the comparison of protein filaments' intrinsic dynamic stabilities, which are key to unraveling their toxic and infectious potentials.
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Affiliation(s)
- David M. Beal
- Kent Fungal Group, School of Biosciences, University of Kent, CT2 7NJ Canterbury, UK
| | - Magali Tournus
- Centrale Marseille, I2M, UMR 7373, CNRS, Aix-Marseille Univ., Marseille 13453, France
| | - Ricardo Marchante
- Kent Fungal Group, School of Biosciences, University of Kent, CT2 7NJ Canterbury, UK
| | - Tracey J. Purton
- Kent Fungal Group, School of Biosciences, University of Kent, CT2 7NJ Canterbury, UK
| | - David P. Smith
- Biomolecular Research Centre, Sheffield Hallam University, Sheffield, UK
| | - Mick F. Tuite
- Kent Fungal Group, School of Biosciences, University of Kent, CT2 7NJ Canterbury, UK
| | - Marie Doumic
- INRIA Rocquencourt, équipe-projet BANG, Domaine de Voluceau, BP 105, 78153 Rocquencourt, France
- Wolfgang Pauli Institute, University of Vienna, Vienna, Austria
| | - Wei-Feng Xue
- Kent Fungal Group, School of Biosciences, University of Kent, CT2 7NJ Canterbury, UK
- INRIA Rocquencourt, équipe-projet BANG, Domaine de Voluceau, BP 105, 78153 Rocquencourt, France
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Langenberg T, Gallardo R, van der Kant R, Louros N, Michiels E, Duran-Romaña R, Houben B, Cassio R, Wilkinson H, Garcia T, Ulens C, Van Durme J, Rousseau F, Schymkowitz J. Thermodynamic and Evolutionary Coupling between the Native and Amyloid State of Globular Proteins. Cell Rep 2020; 31:107512. [PMID: 32294448 PMCID: PMC7175379 DOI: 10.1016/j.celrep.2020.03.076] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 01/12/2020] [Accepted: 03/23/2020] [Indexed: 11/19/2022] Open
Abstract
The amyloid-like aggregation propensity present in most globular proteins is generally considered to be a secondary side effect resulting from the requirements of protein stability. Here, we demonstrate, however, that mutations in the globular and amyloid state are thermodynamically correlated rather than simply associated. In addition, we show that the standard genetic code couples this structural correlation into a tight evolutionary relationship. We illustrate the extent of this evolutionary entanglement of amyloid propensity and globular protein stability. Suppressing a 600-Ma-conserved amyloidogenic segment in the p53 core domain fold is structurally feasible but requires 7-bp substitutions to concomitantly introduce two aggregation-suppressing and three stabilizing amino acid mutations. We speculate that, rather than being a corollary of protein evolution, it is equally plausible that positive selection for amyloid structure could have been a driver for the emergence of globular protein structure.
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Affiliation(s)
- Tobias Langenberg
- Switch Laboratory, VIB Center for Brain and Disease Research, Herestraat 49, 3000 Leuven, Belgium; Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, 3000 Leuven, Belgium
| | - Rodrigo Gallardo
- Switch Laboratory, VIB Center for Brain and Disease Research, Herestraat 49, 3000 Leuven, Belgium; Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, 3000 Leuven, Belgium
| | - Rob van der Kant
- Switch Laboratory, VIB Center for Brain and Disease Research, Herestraat 49, 3000 Leuven, Belgium; Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, 3000 Leuven, Belgium
| | - Nikolaos Louros
- Switch Laboratory, VIB Center for Brain and Disease Research, Herestraat 49, 3000 Leuven, Belgium; Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, 3000 Leuven, Belgium
| | - Emiel Michiels
- Switch Laboratory, VIB Center for Brain and Disease Research, Herestraat 49, 3000 Leuven, Belgium; Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, 3000 Leuven, Belgium
| | - Ramon Duran-Romaña
- Switch Laboratory, VIB Center for Brain and Disease Research, Herestraat 49, 3000 Leuven, Belgium; Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, 3000 Leuven, Belgium
| | - Bert Houben
- Switch Laboratory, VIB Center for Brain and Disease Research, Herestraat 49, 3000 Leuven, Belgium; Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, 3000 Leuven, Belgium
| | - Rafaela Cassio
- Switch Laboratory, VIB Center for Brain and Disease Research, Herestraat 49, 3000 Leuven, Belgium; Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, 3000 Leuven, Belgium
| | - Hannah Wilkinson
- Switch Laboratory, VIB Center for Brain and Disease Research, Herestraat 49, 3000 Leuven, Belgium; Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, 3000 Leuven, Belgium
| | - Teresa Garcia
- Switch Laboratory, VIB Center for Brain and Disease Research, Herestraat 49, 3000 Leuven, Belgium; Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, 3000 Leuven, Belgium
| | - Chris Ulens
- Laboratory of Structural Neurobiology, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, 3000 Leuven, Belgium
| | - Joost Van Durme
- Switch Laboratory, VIB Center for Brain and Disease Research, Herestraat 49, 3000 Leuven, Belgium; Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, 3000 Leuven, Belgium
| | - Frederic Rousseau
- Switch Laboratory, VIB Center for Brain and Disease Research, Herestraat 49, 3000 Leuven, Belgium; Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, 3000 Leuven, Belgium.
| | - Joost Schymkowitz
- Switch Laboratory, VIB Center for Brain and Disease Research, Herestraat 49, 3000 Leuven, Belgium; Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, 3000 Leuven, Belgium.
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5
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Civelek M, Flory S, Meloh H, Fitzenberger E, Wenzel U. The polyphenol quercetin protects from glucotoxicity depending on the aggresome in Caenorhabditis elegans. Eur J Nutr 2019; 59:485-491. [PMID: 30706126 DOI: 10.1007/s00394-019-01917-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 01/25/2019] [Indexed: 10/27/2022]
Abstract
PURPOSE Impaired proteostasis, i.e., protein homeostasis, is considered as a consequence of high-glucose exposure and is associated with reduced survival. The previous studies demonstrated that the polyphenol quercetin can protect from glucotoxicity. The aim of the present study was to unravel the contribution of the aggresome, sequestering potentially cytotoxic aggregates and also acting as a staging center for eventual autophagic clearance from the cell. METHODS Knockdown of the aggresome-relevant genes dnc-1 and ubql-1 was achieved in stress-sensitive mev-1 mutants of the nematode Caenorhabditis elegans by RNA interference (RNAi). Survival assay was conducted under heat stress at 37 °C, protein aggregation using ProteoStat® and chymotrypsin-like proteasomal activity according to the cleavage of a fluorogenic peptide substrate. RESULTS Survival was reduced by knockdown of ubql-1 and even more by knockdown of dnc-1 which both were not further reduced by addition of glucose. The rescue of survival due to quercetin in glucose-exposed nematodes was completely prevented under RNAi versus ubql-1 or dnc-1. Both knockdowns caused an increase of aggregated protein and prevented the reduction of aggregated protein caused by quercetin in glucose-exposed animals. Finally, the knockdown of ubql-1 and dnc-1 blocked the increase of proteasomal activity achieved by quercetin in glucose-treated nematodes. CONCLUSIONS The study provides evidence that quercetin protects C. elegans from glucotoxicity through the activation of the aggresome, thereby, quercetin prevents the aggregation and functional loss of proteins, which is typically caused by enhanced glucose concentrations.
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Affiliation(s)
- Mehtap Civelek
- Interdisciplinary Research Center, Justus-Liebig-University of Giessen, 35392, Giessen, Germany
| | - Sandra Flory
- Interdisciplinary Research Center, Justus-Liebig-University of Giessen, 35392, Giessen, Germany
| | - Hedda Meloh
- Interdisciplinary Research Center, Justus-Liebig-University of Giessen, 35392, Giessen, Germany
| | - Elena Fitzenberger
- Interdisciplinary Research Center, Justus-Liebig-University of Giessen, 35392, Giessen, Germany
| | - Uwe Wenzel
- Interdisciplinary Research Center, Justus-Liebig-University of Giessen, 35392, Giessen, Germany.
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Batista FA, Dores-Silva PR, Borges JC. Molecular Chaperones Involved in Protein Recovery from Aggregates are Present in Protozoa Causative of Malaria and Leishmaniasis. CURR PROTEOMICS 2018. [DOI: 10.2174/1570164615666180626123823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Molecular chaperones have several critical functions in protein metabolism. Among them,
some are involved in processes that culminate in the extraction of entangled polypeptides from protein
aggregates, releasing unfolded structures prone to be refolded or directed to degradation. This action
avoids the effect of toxic aggregates on cells and tissues. Molecular chaperones belonging to the
Hsp100 family are widely distributed from unicellular and sessile organisms up to fungi and plants,
exerting key functions related to the reduction of the effects caused by different forms of stress. The
Hsp100 proteins belong to the AAA+ (ATPases Associated with diverse cellular Activities) family and
form multichaperone systems with Hsp70 and small Hsp chaperones families. However, Hsp100 are
absent in metazoan, where protein disaggregation action is performed by a system involving the Hsp70
family, including Hsp110 and J-protein co-chaperones. Here, the structural and functional aspects of
these protein disaggregation systems will be reviewed and discussed in the perspective of the Hsp100
system absent in the metazoan kingdom. This feature focuses on Hsp100 as a hot spot for drug discovery
against human infectious diseases such as leishmaniasis and malaria, as Hsp100 is critical for microorganisms.
The current data available for Hsp100 in Leishmania spp. and Plasmodium spp. are also
reviewed.
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Affiliation(s)
- Fernanda A.H. Batista
- Instituto de Quimica de Sao Carlos, Universidade de Sao Paulo, Sao Carlos, SP, Brazil
| | - Paulo R. Dores-Silva
- Instituto de Quimica de Sao Carlos, Universidade de Sao Paulo, Sao Carlos, SP, Brazil
| | - Júlio C. Borges
- Instituto de Quimica de Sao Carlos, Universidade de Sao Paulo, Sao Carlos, SP, Brazil
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Prasad R, Xu C, Ng DTW. Hsp40/70/110 chaperones adapt nuclear protein quality control to serve cytosolic clients. J Cell Biol 2018; 217:2019-2032. [PMID: 29653997 PMCID: PMC5987712 DOI: 10.1083/jcb.201706091] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Revised: 02/28/2018] [Accepted: 03/12/2018] [Indexed: 01/26/2023] Open
Abstract
Quality control (QC) pathways for misfolded proteins depend on E3 ubiquitin ligases and associated chaperones. Prasad et al. show that Hsp40/70/110 chaperones traffic and manage misfolded proteins in the nucleus, extending the nuclear protein QC pathway to include cytosolic clients. Misfolded cytosolic proteins are degraded by the ubiquitin proteasome system through quality control (QC) pathways defined by E3 ubiquitin ligases and associated chaperones. Although they work together as a comprehensive system to monitor cytosolic protein folding, their respective contributions remain unclear. To bridge existing gaps, the pathways mediated by the San1 and Ubr1 E3 ligases were studied coordinately. We show that pathways share the same complement of chaperones needed for substrate trafficking, ubiquitination, and degradation. The significance became clear when Ubr1, like San1, was localized primarily to the nucleus. Appending nuclear localization signals to cytosolic substrates revealed that Ydj1 and Sse1 are needed for substrate nuclear import, whereas Ssa1/Ssa2 is needed both outside and inside the nucleus. Sis1 is required to process all substrates inside the nucleus, but its role in trafficking is substrate specific. Together, these data show that using chaperones to traffic misfolded cytosolic proteins into the nucleus extends the nuclear protein QC pathway to include cytosolic clients.
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Affiliation(s)
- Rupali Prasad
- Temasek Life Sciences Laboratory, National University of Singapore, Singapore
| | - Chengchao Xu
- Temasek Life Sciences Laboratory, National University of Singapore, Singapore
| | - Davis T W Ng
- Temasek Life Sciences Laboratory, National University of Singapore, Singapore
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8
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Guilbert SM, Lambert H, Rodrigue M, Fuchs M, Landry J, Lavoie JN. HSPB8 and BAG3 cooperate to promote spatial sequestration of ubiquitinated proteins and coordinate the cellular adaptive response to proteasome insufficiency. FASEB J 2018; 32:3518-3535. [DOI: 10.1096/fj.201700558rr] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Solenn M. Guilbert
- Centre de Recherche sur le Cancer de l'Université LavalUniversité LavalVille de QuébecQuebecCanada
- Oncologie, Centre de Recherche du Centre Hospitalier Universitaire (CHU) de Québec‐Université LavalUniversité LavalVille de QuébecQuebecCanada
| | - Herman Lambert
- Centre de Recherche sur le Cancer de l'Université LavalUniversité LavalVille de QuébecQuebecCanada
- Oncologie, Centre de Recherche du Centre Hospitalier Universitaire (CHU) de Québec‐Université LavalUniversité LavalVille de QuébecQuebecCanada
| | - Marc‐Antoine Rodrigue
- Centre de Recherche sur le Cancer de l'Université LavalUniversité LavalVille de QuébecQuebecCanada
- Oncologie, Centre de Recherche du Centre Hospitalier Universitaire (CHU) de Québec‐Université LavalUniversité LavalVille de QuébecQuebecCanada
| | - Margit Fuchs
- Centre de Recherche sur le Cancer de l'Université LavalUniversité LavalVille de QuébecQuebecCanada
- Oncologie, Centre de Recherche du Centre Hospitalier Universitaire (CHU) de Québec‐Université LavalUniversité LavalVille de QuébecQuebecCanada
| | - Jacques Landry
- Centre de Recherche sur le Cancer de l'Université LavalUniversité LavalVille de QuébecQuebecCanada
- Oncologie, Centre de Recherche du Centre Hospitalier Universitaire (CHU) de Québec‐Université LavalUniversité LavalVille de QuébecQuebecCanada
- Département de Biologie MoléculaireBiochimie Médicale et PathologieUniversité LavalVille de QuébecQuebecCanada
| | - Josée N. Lavoie
- Centre de Recherche sur le Cancer de l'Université LavalUniversité LavalVille de QuébecQuebecCanada
- Oncologie, Centre de Recherche du Centre Hospitalier Universitaire (CHU) de Québec‐Université LavalUniversité LavalVille de QuébecQuebecCanada
- Département de Biologie MoléculaireBiochimie Médicale et PathologieUniversité LavalVille de QuébecQuebecCanada
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Scior A, Buntru A, Arnsburg K, Ast A, Iburg M, Juenemann K, Pigazzini ML, Mlody B, Puchkov D, Priller J, Wanker EE, Prigione A, Kirstein J. Complete suppression of Htt fibrilization and disaggregation of Htt fibrils by a trimeric chaperone complex. EMBO J 2017; 37:282-299. [PMID: 29212816 DOI: 10.15252/embj.201797212] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 10/19/2017] [Accepted: 10/26/2017] [Indexed: 02/06/2023] Open
Abstract
Huntington's disease (HD) is a neurodegenerative disorder caused by an expanded CAG trinucleotide repeat in the huntingtin gene (HTT). Molecular chaperones have been implicated in suppressing or delaying the aggregation of mutant Htt. Using in vitro and in vivo assays, we have identified a trimeric chaperone complex (Hsc70, Hsp110, and J-protein) that completely suppresses fibrilization of HttExon1Q48 The composition of this chaperone complex is variable as recruitment of different chaperone family members forms distinct functional complexes. The trimeric chaperone complex is also able to resolubilize Htt fibrils. We confirmed the biological significance of these findings in HD patient-derived neural cells and on an organismal level in Caenorhabditis elegans Among the proteins in this chaperone complex, the J-protein is the concentration-limiting factor. The single overexpression of DNAJB1 in HEK293T cells is sufficient to profoundly reduce HttExon1Q97 aggregation and represents a target of future therapeutic avenues for HD.
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Affiliation(s)
- Annika Scior
- Leibniz-Institute for Molecular Pharmacology (FMP) im Forschungsverbund Berlin, Berlin, Germany
| | | | - Kristin Arnsburg
- Leibniz-Institute for Molecular Pharmacology (FMP) im Forschungsverbund Berlin, Berlin, Germany
| | - Anne Ast
- Max Delbrueck Center for Molecular Medicine, Berlin, Germany
| | - Manuel Iburg
- Leibniz-Institute for Molecular Pharmacology (FMP) im Forschungsverbund Berlin, Berlin, Germany
| | - Katrin Juenemann
- Leibniz-Institute for Molecular Pharmacology (FMP) im Forschungsverbund Berlin, Berlin, Germany
| | - Maria Lucia Pigazzini
- Leibniz-Institute for Molecular Pharmacology (FMP) im Forschungsverbund Berlin, Berlin, Germany.,Charité - Universitätsmedizin and NeuroCure Cluster of Excellence, Berlin, Germany
| | - Barbara Mlody
- Max Delbrueck Center for Molecular Medicine, Berlin, Germany
| | - Dmytro Puchkov
- Leibniz-Institute for Molecular Pharmacology (FMP) im Forschungsverbund Berlin, Berlin, Germany
| | - Josef Priller
- Department of Neuropsychiatry and Laboratory of Molecular Psychiatry, Charite Universitätsmedizin Berlin, Berlin, Germany
| | - Erich E Wanker
- Max Delbrueck Center for Molecular Medicine, Berlin, Germany
| | | | - Janine Kirstein
- Leibniz-Institute for Molecular Pharmacology (FMP) im Forschungsverbund Berlin, Berlin, Germany
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Liang H, Wu C, Deng Y, Zhu L, Zhang J, Gan W, Tang C, Xu R. Aldehyde Dehydrogenases 1A2 Expression and Distribution are Potentially Associated with Neuron Death in Spinal Cord of Tg(SOD1*G93A)1Gur Mice. Int J Biol Sci 2017; 13:574-587. [PMID: 28539831 PMCID: PMC5441175 DOI: 10.7150/ijbs.19150] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 02/20/2017] [Indexed: 12/11/2022] Open
Abstract
The pathogenesis of amyotrophic lateral sclerosis (ALS) has not been unclear yet, it might be associated with the abnormal expression and distribution of certain proteins. Aldehyde dehydrogenases 1A2 (ALDH1A2) was thought to be one of potential candidates. Therefore, in this study we observed and analyzed the alteration of the expression and distribution of ALDH1A2 in the spinal cord of wild-type (WT) and Tg(SOD1*G93A)1Gur mice. We compared the expression and distribution of ALDH1A2 in the different segments, anatomic regions and neural cells of spinal cord at the different stages of WT and Tg(SOD1*G93A)1Gur mice applied the methods of fluorescent immunohistochemistry and western blot. Results revealed that ALDH1A2 extensively expressed and distributed in the spinal cord of adult WT and Tg(SOD1*G93A)1Gur mice. The expression and distribution of ALDH1A2 in the white matter including the anterior, posterior and lateral funiculus were more than that in the gray matter including the central canal, the anterior and dorsal horn. ALDH1A2 majorly expressed and distributed in the astrocyte, microglial, oligodendrocyte and neuron cells. The ALDH1A2 expression significantly decreased and redistributed in some anatomic regions of spinal cord at the onset and progression stages of Tg(SOD1*G93A)1Gur mice. The expression decrease of ALDH1A2 followed with the increase of neuron cells death. This study suggested that the alteration of expression and distribution of ALDH1A2 was potentially associated with the pathogenesis of ALS.
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Affiliation(s)
- Huiting Liang
- Department of Neurology, First Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi, China
| | - Chengsi Wu
- Department of Neurology, First Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi, China
| | - Youqing Deng
- Department of Neurology, Third Affiliated Hospital of Nanchang University, Nanchang 330008, Jiangxi, China
| | - Lei Zhu
- Department of Neurology, First Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi, China
| | - Jie Zhang
- Department of Neurology, First Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi, China
| | - Weiming Gan
- Department of Neurology, First Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi, China
| | - Chunyan Tang
- Department of Neurology, First Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi, China
| | - Renshi Xu
- Department of Neurology, First Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi, China
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